title: Silicon alleviates cadmium toxicity in Avicennia marina (Forsk.) Vierh. seedlings in relation to root anatomy and radial oxygen loss.
abstract: The effects of Si on growth, the anatomy of the roots, radial oxygen loss (ROL) and Fe/Mn plaque on the root surface were investigated in Avicennia marina (Forsk.) Vierh. seedlings under Cd stress. Si prompted the growth of seedlings and reduced the Cd concentration in the root, stem and leaf of A. marina. Si prompted the development of the apoplastic barrier in the roots, which may be related to the reduction of Cd uptake. The higher amount of ROL and Mn plaque on the root surface due to Si were also related to the promotion of Cd tolerance in A. marina seedlings. Therefore, it is concluded that the alteration of the anatomy of the roots, the increase of ROL and Mn plaque of A. marina seedlings play an important role in alleviation of Cd toxicity due to Si.
authors.affiliation: Key Laboratory of Ministry of Education for Coastal and Wetland Ecosystems, School of Life Sciences, Xiamen University, Xiangan South Road, Xiangan District, Xiamen 361102, Fujian Province, PR China; Department of Biological Sciences and Biotechnology, Minnan Normal University, Zhangzhou 363000, Fujian Province, PR China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Zhang
authors.forename: Chongling
authors.initials: C
authors.lastname: Yan
authors.forename: Jingchun
authors.initials: J
authors.lastname: Liu
authors.forename: Haoliang
authors.initials: H
authors.lastname: Lu
authors.forename: Wenyun
authors.initials: W
authors.lastname: Wang
authors.forename: Jingna
authors.initials: J
authors.lastname: Du
authors.forename: Hanhui
authors.initials: H
authors.lastname: Duan
mesh_terms: D032407:Avicennia / Q000502:physiology*; D002104:Cadmium / Q000633:toxicity*; D010100:Oxygen / Q000378:metabolism*; D018517:Plant Roots / Q000033:anatomy & histology / Q000502:physiology*; D036226:Seedlings / Q000502:physiology*; D012825:Silicon / Q000737:chemistry / Q000378:metabolism*; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D014874:Water Pollutants, Chemical; D002104:Cadmium; D010100:Oxygen; D012825:Silicon
keywords: Avicennia marina; Cadmium; Radial oxygen loss; Root Anatomy; Silicon